Hello,

I have a Tomtom One XL Start edition with navcore 9.510. I want to upgrade to Truck but when i install truck navcore i have no sound what so ever.
When i try another navcore i have the same thing, no sound.
When i put my backup back sound is back??

How can i fix this or how can i upgrade with sound to another navcore.

Hope someone can help me.

Greetz